iOS 10.3 (build 14E277) is an official Apple over-the-air update for the iPhone SE, released on 2017-03-27T16:58:20Z. The update package is 576.52 MB. This is a delta (partial) update that requires 10.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 1b331cd2cfba08e2694a48e6be3e5d14db82c998.zip.